been on medication most of my life. I was put on imipramine in the 80s I had severe constipation for years so decided to try new SSRIs 3 yrs ago. I first tried Zoloft it mad me drousy and tired .when I had been on the Zoloft for about 2 months I had a weird weak spell it scared me and I went to the dr and had a EKG it showed I had enlargement in the upper chamber of my heart. I later went to a cardiologist who did a echo of my heart and didn't show any thing. do you think that could have been from the Zoloft? I later went on Prozac and it helped me a lot I feel my sleep was different I was waking up sometimes every 2 hrs. I then went off the Prozac after a yr and with in 2 months had another terrible weak spell I kept having them almost every day went to the ER didn't find any thing wrong with me a good EKG. was told to get back on my meds. I tried to get back on Prozac but after about 2 wks could not sleep at all. I tried for about another week and then switched to celexa after about 6 wks the weak spells got better I was sleeping better. It has been about 6 months on 20 mg celexa and I still have some mild weak spells and I am having sleep problems again. I wonder why I started with the weak spells after starting the SSRI have they caused this. I usually think I am dying when they are real, bad and the feeling start before the fear. it is all physical, so I am wondering is the medicine cause this? I am seeing a Pdr in a week and need to be educated on what my options are. I have agrophobia and needed to work on that so was stupid to go off my medicine. I was so stable on the Prozac but hate not being able to sleep and I think it will be ongoing. I have a prescription for trazodone but have never tried it. I hate taking 2 meds also would it lose its effect with time. I know there are the TCAs but don't know if I could take the constipation and am also afraid of the heart thing. I am afraid of that with the celexa. it has controlled my anxiety a lot but I still get worried when I feel weak. I have been to several drs and none know what is causing this I have a lot of blood work done. I thought about trying the Zoloft again I wouldn't think the weak spells were dangerous would they be. I wonder if the EKG just went wrong do they ever malfunction? If I didn't have the sleep problem I would do the Prozac again. I had less weak spells on it. I am also 60 years old can you take these medications into your 70s? I know a lot of questions I have been thinking about this for awhile and now my sleep has been a problem for about a week now. I need a long term solutions. I don't like changing medicine and I was hoping celexa would be it.